ID:15388 DSP block output WYSIWYG primitive "<name>" has <name> port that must be driven by the dataout port of a DSP block output WYSIWYG primitive with the OPERATION_MODE value set to ACCUMULATOR_CHAIN_OUT or TWO_LEVEL_ADDER_CHAIN_OUT

CAUSE: The specified port of the specified DSP block output WYSIWYG primitive is driven by an illegal primitive. The specified port must be driven by a DSP block output WYSIWYG primitive with the OPERATION_MODE value set to ACCUMULATOR_CHAIN_OUT or TWO_LEVEL_ADDER_CHAIN_OUT.

ACTION: Disconnect the specified port of the specified WYSIWYG DSP block output primitive, or check that the WYSIWYG DSP block output primitive feeding the specified port has the OPERATION_MODE parameter set to TWO_LEVEL_ADDER_CHAIN_OUT or ACCUMULATOR_CHAIN_OUT.